The number of simultaneous sessions you may have depends on your plan. The developer plan offers 1 simultaneous session, the basic plan offers 50 simultaneous sessions, and the enterprise plan offers unlimited simultaneous sessions.
If you exceed your number of simultaneous sessions, callstats.io will still receive the data from the exceeded sessions and you will still be able to access it. However, the system will note that there was an increase in usage, and send a warning email if there is a sustained increase.
If the volume increase is expected to remain, we suggest going to your account at My Organizations > Billing > Plans and upgrading your plan.